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bug#1525: prompt string for execute-extended-command not flexible

From: Lars Magne Ingebrigtsen
Subject: bug#1525: prompt string for execute-extended-command not flexible
Date: Sun, 10 Jul 2011 15:15:51 +0200
User-agent: Gnus/5.110018 (No Gnus v0.18) Emacs/24.0.50 (gnu/linux)

xah lee <address@hidden> writes:

> The prompt string for execute-extended-command is “M-x ”, but that is
> not correct if the command is bound to some other key by
> customization.
> Kevin Rodgers gave this explanation recently in “gnu.emacs.help”:
> «
> address@hidden wrote:
>> When you type a command in Emacs you are greeted with the prompt "M-
>> x".  How change that prompt string?
> Change this code in src/keyboard.c and recompile emacs:
>    /* This isn't strictly correct if execute-extended-command
>       is bound to anything else.  Perhaps it should use
>       this_command_keys?  */
>    strcat (buf, "M-x ");

This is no longer done, but it's still not quite right.

If you do:

(local-set-key [(meta z)] 'execute-extended-command)

Then you still get "M-x" as the prompt if you do `M-z'.

The reason is that it looks up the command first, and then picks one of
the bindings as the description, with code that's kinda like this:

(key-description (car (where-is-internal 'execute-extended-command)))

Is there any reason it doesn't just use this_command_keys which
presumably would be more correct?

(domestic pets only, the antidote for overdose, milk.)
  bloggy blog http://lars.ingebrigtsen.no/

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